Why Outlook Search Isn’t Working (and How to Fix It)  

Summary 

Outlook search may stop working because of incomplete indexing, Windows Search problems, narrow search settings, hidden filters, outdated software, or damaged Outlook profiles. This guide explains how to troubleshoot common issues and how desktop search software like Copernic can help you search emails, attachments, local files, and cloud content from one place. 

Why Outlook Search Isn’t Working (and How to Fix It) 

Most of us have an inbox full of thousands of emails, attachments, contacts, and calendar items. You know you have an email about a lunch meeting from a vendor, but you can’t find it. Outlook search simply isn’t locating the message. 

Outlook search often fails. It might be issues with indexing or settings, or it might be that traditional email search simply isn’t doing what you need it to do. Properly troubleshooting Outlook search can help you find the email you need, whether it’s through fixing your email or Windows indexes, searching the wrong mailbox, or hiding email behind filters. 

Read on to find out why Outlook search might be letting you down, and when you might want to consider upgrading to desktop search software such as Copernic Desktop & Cloud Search. 

Here are the most common causes of Outlook search not working: 

1. Outlook Hasn’t Finished Indexing Your Emails 

Sometimes, Outlook has to re-index your emails. New installations, updates, and profile changes can require reindexing. With a large mailbox, this can take a while. 

When you do a search, you may get the message “Outlook is currently indexing your items.” It can take as long as 48 hours to index a large mailbox. If it takes longer, indexing may be stuck, which requires reinstalling Outlook. One thing to try is to go to the web interface and see if search works there. If it does, consider emptying the local cache by opening the Run dialog, entering %localappdata%\Microsoft\Outlook, opening the RoamCache folder and deleting all files inside. 

If indexing is paused, don’t click Resume. You would think that would work. It rarely does. Close Outlook completely, open command prompt, and run net stop wsearch and then net start wsearch. Then rebuild again. 

2. The Windows Search Index Is Having Problems 

Modern Outlook depends on Windows Search for its own search. In fact, one surprisingly common issue is that Windows Search is simply turned off. Check that first. Then, if it is running, you will need to rebuild the search index. Go to indexing, advanced options, troubleshooting, and click rebuild. If possible, do this at the end of the day, leaving the computer running. It typically takes at least a few hours to reindex and can take as long as a day. 

Another thing to try is resetting Windows Search settings to default and then redoing your settings; this can resolve issues quickly. 

Also make sure your computer is up to date. 

3. Your Search Is Too Narrow 

You’re searching your inbox; but you moved the message to an important folder that isn’t included in the search. Double check to see the scope. If it says Current Folder or Current Mailbox, try switching it to All Mailboxes. “Missing” messages will often reappear when you do this. 

Make sure to include trash, too, in case you accidentally deleted the message and it’s still in the trash. 

Sometimes it makes sense to search only the current mailbox, but when you are desperately searching for a message widening the search is often the first thing to try. 

4. Your Search Terms Don’t Match the Email 

Your memory says that the email says to meet at “Floral Teas” when it’s actually “Flora Teas.” Or you’re searching on the sender’s name but are using “Thomson” instead of “Thompson.” Searching on email addresses is more accurate, but they are even harder to remember accurately. The subject line may not be what you think it is either. 

Or the information may be in an attachment, not the email body. Try broadening your search terms. You could, for example, search for the date range when you think it was sent. 

Modern desktop search can help with this by searching attachments as well as email bodies and making it easier to search for date ranges and known senders. 

5. Filters Are Hiding the Results 

You set a filter to get your inbox under control and forgot. Now the email you need is hiding behind the filter. You may, for example, have set your system to only show unread messages so you can focus on what’s new. 

Go to the lower left corner of Outlook, double click Filter Applied > Clear All > OK. Then click View > Change view > Apply current view to other mail folders. This should clear your filters and then you can repeat the search and hopefully find the missing email. 

6. Outlook or Microsoft 365 Needs an Update 

Always keep your software up to date. Search bugs can be dealt with by installing the latest update. Check for updates and make sure to restart Outlook after updating. If you’re still having issues, reboot your entire computer to make sure everything has restarted. 

Another thing to check is Microsoft’s service status. If search suddenly stops working, there may be a cloud outage impacting your organization. 

7. Your Outlook Profile or Data File Has a Problem 

Another thing that can mess up Outlook search is a damaged profile or local data. You might need to repair Outlook or create a new profile. Please talk to IT before doing this, though; messing with your profile can easily break other things, such as your role-based permissions, and then IT will have to spend more time fixing it and you may not be able to access your files. 

Always try a reboot first before repairing Outlook; sometimes this can trigger a rebuild of a file that fixes the problem. 

8. The Email is Archived or Stored Somewhere Unexpected 

Imagine you’re looking for your onboarding email from five years ago. Chances are, it’s not in Outlook anymore. It may be in an archive, PST file, or shared mailbox. Or in a folder named something which made sense at the time. 

This can cause search behaviour to vary. Always check deleted items and online archives as well. This is another place modern desktop and cloud search can really shine; you can set it to search all those locations in one click. 

When Outlook Search Works – but Still Can’t Find What You Need 

You’ve tried all the troubleshooting. In fact, you’re confident Outlook search is, in fact working properly. The issue may be that it’s simply not up to the task, and part of why fallible human memory is. 

We often remember only fragments of the email we’re looking for, things like a phrase inside an attachment, the week we received it, the name of the associated client or project, etc. And then the information may, in fact, not be in email at all, but in a local file, network drive, or one of two or three cloud platforms. No matter how “correctly” search is working, it can’t help you if the data isn’t where you think you put it. 

How Desktop Search Can Make Finding Outlook Emails Easier 

Modern Desktop and Cloud Search, like Copernic, can really help. Unlike more traditional search, it is designed to search all your content from a single interface. This includes emails and attachments and provides advanced search criteria to help narrow down large volumes of email and documents. 

Outlook Search vs. Desktop Search 

Outlook Search works when you know the information is in Outlook and have a solid idea of where you put it and what you are looking for. Desktop Search comes in when you don’t know whether the information is in an email, attachment, or other document. It doesn’t necessarily replace Outlook search, which is right there when you’re looking through your email. But it can complement it and expand your search capability. 

Tips for Finding Emails Faster 

Here are some tips for finding that missing email faster: 

1. Start with a broad search, then narrow it down. If you go straight to a narrow search, you’re more likely to have misremembered a key detail and not be able to find it at all. 

2. Search distinctive phrases and words. Use the most unique phrase you can remember, rather than something generic. 

3. Use sender, date, and attachment information when you can. 

4. Make sure your important archives are searchable and avoid searching only specific folders. 

5. Use a desktop search solution when you aren’t sure which of multiple sources holds the information you have. 

Outlook search failures stem from a variety of causes including indexing issues, narrow scope, unexpected filters, software issues, and profile problems. Most of these problems can be resolved with basic troubleshooting. 

However, Outlook search sometimes fails because we are asking too much of it. It has limitations when you need to search emails, attachments, and other business files.  

Copernic Desktop Search helps you find all your documents and information as it searches for 170+ different file types, even if you can’t remember exactly where it is stored. Try it for 30-days and see how quickly you can find what you need when you need it! 

FAQs

Why is Outlook not finding emails I know exist? 

Outlook may still be indexing your mailbox, searching the wrong folder, applying hidden filters, or using search terms that do not exactly match the email. Try expanding the search to All Mailboxes and using broader terms, dates, or sender information. 

How long does Outlook indexing take? 

Indexing can take several hours and, for a large mailbox, may take up to 48 hours. Keep your computer turned on and Outlook running while indexing is completed. 

How do I rebuild the Outlook search index? 

Because Outlook relies on Windows Search, you can rebuild the index through Windows Indexing Options. Select Advanced, choose Rebuild under Troubleshooting, and allow enough time for the process to finish. 

Why can’t Outlook search find words inside attachments? 

Outlook may not index every attachment type or storage location consistently. Copernic Desktop & Cloud Search can search email bodies, attachments, and more than 170 file types across multiple locations. 

What is the difference between Outlook Search and desktop search software? 

Outlook Search is useful when you know the information is stored in Outlook. Desktop search software provides a broader search across emails, attachments, local folders, network drives, archives, and supported cloud platforms.